[R] If it's not a data.frame, matrix or vector, what is it?

[Liaw, Andy]

What does str(submin$display.gname) say?

Andy

> From: michael watson (IAH-C)
> 
> Hi
> 
> Forgive my ignorance.  I am selecting a column of a 
> data.frame using the
> column name, and I want to know what the resulting column 
> "is".  My data
> frame is called "submin" and the column name is held in a variable
> called "display.gname" Eg:
> 
> > is.data.frame(submin)
> [1] TRUE
> > is.data.frame(submin[,display.gname])
> [1] FALSE
> > is.matrix(submin[,display.gname])
> [1] FALSE
> > is.vector(submin[,display.gname])
> [1] FALSE
> > length(submin[,display.gname])
> [1] 4622
> 
> So if it's not a data.frame, a matrix or a vector, what is "it"?
> 
> Thanks (and sorry if this is in the FAQ)
> 
> Mick
> 
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